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I am building an application in extjs, the ext-all.js size is 700kb which is very big and not acceptable by our technical architect. So what should I do ?
Should I remove extjs and build in some other UI.
or
I can do something about size ?
You should calmly but firmly explain the following to your technical architect:
The browser will treat the JavaScript file as a static resource and cache it after the initial download, so each visitor will only download the file once (unless they clear their browser cache, which most people don’t), even if it is included on every page on the website.
Any modern web server supports automatic gzip compression of text documents (which includes things like JavaScript files). Assuming this is enabled, it means that the amount of data that the client actually downloads is significantly less than 700 KB. You can see what the actual download size is by taking your 700 KB JavaScript file and archiving it with gzip (or any equivalent utility).